diff --git a/proxcenter-compose.yml b/proxcenter-compose.yml
index 3912c3e..ae223ee 100644
--- a/proxcenter-compose.yml
+++ b/proxcenter-compose.yml
@@ -91,6 +91,9 @@ services:
   # ========================================
   postgres:
     image: postgres:16-alpine
+    # Run as the postgres UID/GID used by postgres:16-alpine so the NFS-backed
+    # data directory can be owned by 70:70 on TrueNAS and avoid startup chown failures.
+    user: "70:70"
     environment:
       - POSTGRES_USER=${POSTGRES_USER:-proxcenter}
       - POSTGRES_PASSWORD=${POSTGRES_PASSWORD}